CP51 Sentinel MK IV

Mark IV Sentinels are a new breed of powerful war machines designed to hunt and eradicate mutants. Electric and plasma blasts, catch-web cables, and extraordinary physical strength are among the armament systems built into the Mark IV class of Sentinels. Sentinels are a lethal threat to all mutantkind, as they are constantly modified to become more powerful each time
they face the same opponent.

Sentinels cannot be convinced to deviate from their training; they relentlessly pursue their victims until they achieve their goal—the extinction of their mutant prey.